Investigation of flash boiling injection schemes in lean-burn gasoline direct injection engines
| Autor: | Hongyu Wang, Min Xu, Mohamed Nour, Xuesong Li, Zhe Sun, Mingli Cui |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Gasoline direct injection engines
Economics and Econometrics Thermal efficiency Materials science Flash boiling atomization Nuclear engineering Optical engine Reciprocating engine Forestry Fuel Combustion Flame speed Energy industries. Energy policy. Fuel trade Cylinder (engine) law.invention Split injection TP315-360 law Materials Chemistry Media Technology HD9502-9502.5 Gasoline Gasoline direct injection Lean burn |
| Zdroj: | Applications in Energy and Combustion Science, Vol 7, Iss, Pp 100035-(2021) |
| ISSN: | 2666-352X |
| DOI: | 10.1016/j.jaecs.2021.100035 |
| Popis: | Flash boiling atomization has the potential to enable superior spray atomization and more homogenous fuel-air mixing. These capabilities have been demonstrated in practical combustors such as gasoline direct-injection (GDI) engines. However, optimal injection schemes for flash boiling atomization has not been thoroughly investigated yet in the existing literature. In this work, we examined such contents in the aspects of split injection schemes coupled with flash boiling atomization. The impacts were examined firstly by velocity field analysis on single injection flash boiling plumes using particle imaging velocimetry (PIV). Furthermore, an optical reciprocating engine facility was used to study flame characteristics. Spray morphologies in the cylinder were studied, and the velocity field was visualized by the optical flow method. Important combustion characteristics, such as the flame speed and combustion duration, were investigated. Finally, the thermal efficiency under different injection schemes, as well as combustion emissions were quantified and compared to discuss the influence of flash boiling atomization on lean-operated GDI engines. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|